diff --git a/src/nodedef.cpp b/src/nodedef.cpp
index 6d740fac3..1dd5aa537 100644
--- a/src/nodedef.cpp
+++ b/src/nodedef.cpp
@@ -853,7 +853,7 @@ void CNodeDefManager::updateTextures(IGameDef *gamedef,
 			assert(f->liquid_type == LIQUID_SOURCE);
 			if (opaque_water)
 				f->alpha = 255;
-			f->solidness = 0;
+			f->solidness = 1;
 			is_liquid = true;
 			break;
 		case NDT_FLOWINGLIQUID: